On the video, obtained by The Associated Press, a supervisor tells an undercover investigator for People for the Ethical Treatment of Animals that when he gets angry or a sow won't move, "I grab one of these rods and jam it in her (anus)."

The farm, located outside of Bayard, Iowa, about 60 miles west of Des Moines, is a supplier to Hormel Foods of Austin, Minn. PETA wants to use the results of the investigation to pressure Hormel, the maker of Spam and other food products, to demand that its suppliers ensure humane treatment of pigs.